RFP for the Engine Build for the Missile

no offence but I made the same power, with an eddy head and alot less money.

The roller in my engine may be the equalizer between the heads you have and the cam I have... I really dont know for sure.

BPE also has a 4.250 stroke crank - that R block will handle it - the indy heads will handle it and it will make well into the 700 hp range if I built it - put a friggin roller cam in that ***** and let it eat!
You say you want the power lower? well then you need to look into adding stroke - the longer the stroke the lower the power comes in at - the 4.250 was an option for me but i chose not to because of the eddy head - you have no such limitations and could potentially lower your powerband about 500 rpm at least.